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Impact Of Level Of Use On Plant Vigor And Weight Of Festuca Humilior And Calamagrostis Vicunarum, T. Edson, L. Aguirre, E. R. Flores
Impact Of Level Of Use On Plant Vigor And Weight Of Festuca Humilior And Calamagrostis Vicunarum, T. Edson, L. Aguirre, E. R. Flores
IGC Proceedings (1977-2023)
Tussock grasslands of Festuca humilior and Calamagrostis vicunarum cover a significant extension of the central Andes of Peru, constituting a plant association highly appreciated by cattle ranchers. The objective of this research was to estimate the cumulative impact of the level of use of the key grasses Festuca humilior and Calamagrostis vicunarum on plant height, vigor, and weight. This study was conducted in a humid grassland of regular condition located at 4186 masl in the Puna ecoregion. The variables evaluated were: plant height, basal and canopy diameter and plant weight. The experiment lasted two years in which individual plants from …
The Effect Of Npk Fertilisation On Structure And Species Composition Of Grasslands, Frantisek Hrabě, Jiří Skládanka
The Effect Of Npk Fertilisation On Structure And Species Composition Of Grasslands, Frantisek Hrabě, Jiří Skládanka
IGC Proceedings (1977-2023)
Long-term research into the effect of N+PK nutrition enables an objective evaluation of the trend and rate of succession and a prediction of changes including production development in permanent grassland (Hrabě et al., 1991). Former research (Hrabě & Halva, 1993) and evaluation within an eco-system concept (Rychnovská et al., 1994) demonstrated marked changes in the species composition of grass communities with the application of N+PK fertilisation that did not correspond to the sward type and site conditions.
Forage Legume Persistence In Mixtures With Native And Introduced Grasses At A Semiarid Location On The Canadian Prairies, P. G. Jefferson, A. D. Iwaasa, Michael P. Schellenberg
Forage Legume Persistence In Mixtures With Native And Introduced Grasses At A Semiarid Location On The Canadian Prairies, P. G. Jefferson, A. D. Iwaasa, Michael P. Schellenberg
IGC Proceedings (1977-2023)
Cultivars of native grass species with adequate nutritive value for summer and early fall grazing by beef cattle are becoming available for seeding in the Canadian prairie region (Jefferson et al. 2004). Mixing native grass species with introduced legumes could improve forage quality but little information is available on legume persistence with these species. This experiment aimed to determine the persistence of 3 forage legumes when seeded with 3 native grasses compared to 3 introduced grasses.
Floristic Composition As A Parameter Of The Quality Of The Grassland Type Festucetum Vallesacae In Thestara Planina Hilly-Mountainous Region Of Serbia, Z. Nesic, Z. Tomic, S. Mrfat-Vukelic, M. Zujovic, I. Djalovic, S. Djordjevic
Floristic Composition As A Parameter Of The Quality Of The Grassland Type Festucetum Vallesacae In Thestara Planina Hilly-Mountainous Region Of Serbia, Z. Nesic, Z. Tomic, S. Mrfat-Vukelic, M. Zujovic, I. Djalovic, S. Djordjevic
IGC Proceedings (1977-2023)
With the increase of sea level and changes of climatic conditions, the possibilities for growing cultivated forages decreases. Therefore natural grasslands will become more important in relation to livestock nutrition. This will increase the importance of the nutritive value of these natural grasslands that have very diverse and dynamic floristic composition. The quality of the grassland depends on species categorised as grasses, legumes and other species. Other species were often regarded as harmful in regard to quality, however, they often contain many medicinal and stimulating substances that may have beneficial effects on animals and on the quality of animal products …
Floristic Composition As Parameter Of Quality Of Ass. Agrostietum Vulgaris, Z. Tomic, S. Mrfat-Vukelic, Z. Nesic, M. Zujovic, S. Djordjevic-Milosevic
Floristic Composition As Parameter Of Quality Of Ass. Agrostietum Vulgaris, Z. Tomic, S. Mrfat-Vukelic, Z. Nesic, M. Zujovic, S. Djordjevic-Milosevic
IGC Proceedings (1977-2023)
In hilly-mountainous region of Serbia, meadows and pastures are the main sourcees of roughage feeds and grazing for ruminants. On Stara Planina mountain, in SE Serbia, meadows and pastures with different plant associations and a wide range of species of differing nutritional value predominate. Until the 1930s, and even until now, only species of the grass family and leguminous plants were desired and all other plants were considered worthless or harmful Klapp (1986). The main criteria to evaluate whether a meadow plant species is a weed are: is it poisonous?; is it suitable for consumption by domestic animals as regards …
Relationships Between Productivity, Quality And Traits In Seven Co-Occurring Grass Species, L. S. Pontes, Jean-François Soussana, P. Carrère, F. Louault, J. Aufrère, D. Andueza
Relationships Between Productivity, Quality And Traits In Seven Co-Occurring Grass Species, L. S. Pontes, Jean-François Soussana, P. Carrère, F. Louault, J. Aufrère, D. Andueza
IGC Proceedings (1977-2023)
The impacts of management options sometimes have dramatic effects on botanical composition which in turn affect yield and nutritive value. A functional analysis of vegetation response may help to understand and predict the impact of changes in grassland management in a more general way screening for plant traits that may control productivity and nutritive value.
Forage Yield And Soil Moisture Content In Panicum Maximum Cv. Tanzania Monoculture And In A Mixture With Leucaena Leucocephala With Different Densities In Mexico, H. J. Delgado Gómez, Juan C. Ku-Vera, J. Ku Vera, J. Escamilla Bencomo, P. A. Velázquez Madrazo
Forage Yield And Soil Moisture Content In Panicum Maximum Cv. Tanzania Monoculture And In A Mixture With Leucaena Leucocephala With Different Densities In Mexico, H. J. Delgado Gómez, Juan C. Ku-Vera, J. Ku Vera, J. Escamilla Bencomo, P. A. Velázquez Madrazo
IGC Proceedings (1977-2023)
Cattle production is limited by forage availability during the dry season since water and soil fertility are the main factors limiting production. Leucaena leucocephala has good nutritive value (24-30% CP). It can stand drought and grazing and so its introduction into pastures is recommended as an alternative to forage production during the dry season. The aim of this study was to assess the effect of the introduction of L. leucocephala with different densities on biomass production of P. maximum and soil water content.
Responses Of Irrigated Pasture Nutritive Characteristics To Summer Nitrogen Fertiliser, Frank R. Mckenzie, J. L. Jacobs, G. N. Ward
Responses Of Irrigated Pasture Nutritive Characteristics To Summer Nitrogen Fertiliser, Frank R. Mckenzie, J. L. Jacobs, G. N. Ward
IGC Proceedings (1977-2023)
Low summer rainfall in southwest Victoria, Australia, restricts pasture growth and reduces pasture nutritive value thereby limiting potential milk production. One fifth of dairy farmers in the region have some capacity to irrigate during summer and nitrogen (N) fertiliser is used to enhance pasture dry matter (DM) yield. Data on the effects of N fertiliser on irrigated pasture nutritive characteristics during summer in southwest Victoria are lacking. Two experiments determined the potential of N fertiliser to improve pasture nutritive (crude protein, CP and metabolisable energy, ME) value during summer.
Selecting Grassland Species For Saline Environments, Mary-Jane E. Rogers, A. D. Craig, T. D. Colmer, R. Munns, S. J. Hughes, P. M. Evans, P. G. H. Nichols, R. Snowball, D. Henry, J. Deretic, B. Dear, M. Ewing
Selecting Grassland Species For Saline Environments, Mary-Jane E. Rogers, A. D. Craig, T. D. Colmer, R. Munns, S. J. Hughes, P. M. Evans, P. G. H. Nichols, R. Snowball, D. Henry, J. Deretic, B. Dear, M. Ewing
IGC Proceedings (1977-2023)
In Australia, around 5.7 million hectares of agricultural land are currently affected by dryland salinity or at risk from shallow water tables and this figure is expected to increase over the next 50 years (LWRA, 2001). Most improved grassland species cannot tolerate the combined effects of salt and waterlogging and, therefore, the productivity of sown grasslands in salt-affected areas is low. However, there is potential to overcome the lack of suitably adapted fodder species by introducing new, salt and waterlogging-tolerant species and by diversifying the gene pool of proven species. Potential species include exotic, naturalised and native Australian grass, legumes, …
Effect Of Mineral Nutrition On Red Clover Leaf Area Index, B. Cupina, P. Erić, S. Vasiljević, V. Mihailovic, D. Milic
Effect Of Mineral Nutrition On Red Clover Leaf Area Index, B. Cupina, P. Erić, S. Vasiljević, V. Mihailovic, D. Milic
IGC Proceedings (1977-2023)
The legume red clover (Trifolium pratense) fixes its own nitrogen (N), but requires P and K fertilisation. There are no recent reliable data in the domestic literature, on the amounts of P and K recommended to farmers; present recommendations are often either inadequate or excessive. Red clover mineral nutrition is significantly affected by soil and weather conditions (Taylor & Quesenberry, 1996). The objective of our twoyear study was to enable rational fertiliser application in accordance with soil type and agro ecological conditions.
Effect Of Fertilisation With Macro And Micronutrients On The Mineral Content Of Leucaena Leucocephala, S. Camacaro
Effect Of Fertilisation With Macro And Micronutrients On The Mineral Content Of Leucaena Leucocephala, S. Camacaro
IGC Proceedings (1977-2023)
The Venezuelan cattle industry has been developed in areas with soil limitations, causing a negative impact on animal production, since the pastures are of medium to low quality and quick maturation (Chacón, 1996). On the other hand, forage legumes have been introduced to improve the nutritive value of the biomass on offer. Growing interest has been shown in Leucaena leucocephala in recent years due to its multiple benefits (Duguma et al., 1988). However the use of varieties not adapted to acid soils can be a problem, largely due their low tolerance to the toxicity of the aluminium and to …
Effect Of Mineral Fertiliser Levels On The Yield Quality Of Perennial Ryegrass, S. R. Bumane, Aleksandr Adamovich
Effect Of Mineral Fertiliser Levels On The Yield Quality Of Perennial Ryegrass, S. R. Bumane, Aleksandr Adamovich
IGC Proceedings (1977-2023)
Perennial ryegrass is a short-lived bunch-grass with shallow root system. The plant is nutritious and palatable and stands up to hard grazing. It will not do well under poor conditions, where fertility or rainfall is low. Perennial ryegrass is a major component in different seed mixtures that are used for grassland management and forage production. This plant is the predominant component in nearly all pasture mixtures, with perennial ryegrass and white or red clover forming the basis for permanent pasture for dairy production and cattle. This grass species plays an important role in grassland productivity and forage quality. Ryegrass requires …
Combinations Of Nitrogen And Sulphur For Signal Grass Yield, F. A. Monteiro, C. P. Silveira
Combinations Of Nitrogen And Sulphur For Signal Grass Yield, F. A. Monteiro, C. P. Silveira
IGC Proceedings (1977-2023)
Signal grass (Brachiaria decumbens) is grown in Brazilian pastures, and the increase in forage yield of such pastures is achieved by fertilization. Nitrogen (N) is the nutrient mostly demanded for increasing grass productivity, and its utilization creates a demand for other nutrients, such as sulphur (S). These two nutrients are well related in plant metabolism, but the S nutrition of signal grass must be better understood. The use of a fractional factorial makes possible the study of several rates of these two nutrients, that combined with the response surface methodology allows anyone to find out the responses to …
Increase In Forage Maize Production By Bacterial Fertilisers, D. Egamberdiyeva, G. Hoflich
Increase In Forage Maize Production By Bacterial Fertilisers, D. Egamberdiyeva, G. Hoflich
IGC Proceedings (1977-2023)
Farmers in many countries value green material generated from maize as a high quality forage. Its inclusion in dairy cow diets can improve forage intake, increase animal performance and has the potential to reduce production costs (Phipps, 1994). Restrictions on the use of chemical fertilisers and a renewed interest in organic sustainable farming systems in general, has restored attention to crop rotations The increase of maize production using bacterial fertilisers also gives alternative ways to reduce chemical fertilisers in forage production. Increased uptake of nutrients such as N, P, and K and crop yield was reported with rhizobacteria (Lazarovits & …
The Effect Of Nitrogen Fixation And Plant Species On Ammonium And Amino Acids Soil Contents, F. Lesuffleur, S. Diquélou, A. Bré, J. B. Cliquet
The Effect Of Nitrogen Fixation And Plant Species On Ammonium And Amino Acids Soil Contents, F. Lesuffleur, S. Diquélou, A. Bré, J. B. Cliquet
IGC Proceedings (1977-2023)
Grass and legume intercropping systems, particularly ryegrass-clover mixed cultures, increase grasslands productivity, due to the clover nitrogen (N) fixation and to the transfer of part it to the companion grass. The objective of this experiment was to determine if N fixation and plant species could modify ammonium and amino acids soil contents.
Modelling Urine Nitrogen Production And Leaching Losses For Pasture-Based Dairying Systems, I. M. Brookes, D. J. Horne
Modelling Urine Nitrogen Production And Leaching Losses For Pasture-Based Dairying Systems, I. M. Brookes, D. J. Horne
IGC Proceedings (1977-2023)
Urine from dairy cattle grazing pastures with high crude protein (CP) concentrations is a major source of N lost in drainage water from New Zealand farms. This paper provides predictions of urinary N leaching losses for a range of stocking rates and levels of supplementation.
Cap Reform And Nitrate Restrictions: Implications For Irish Grass Based Dairy Production Systems, Anne Marie Butler, M. Wallace, P. Dillon
Cap Reform And Nitrate Restrictions: Implications For Irish Grass Based Dairy Production Systems, Anne Marie Butler, M. Wallace, P. Dillon
IGC Proceedings (1977-2023)
The benefit of a systems approach to analysing production situations has long been recognised in agricultural research. The development and application of production-oriented dairy models offer tremendous capabilities for both encompassing the realities faced by producers while also considering the adaptation possibilities available to them in light of internal and external forces of change. This farm level dairy model represents one such approach. The objectives of the study were: (1) to develop a comprehensive farm-level model of Irish milk production systems and (2) to apply the model to identify optimal adaptation strategies of dairy farmers within the context of European …
Sustainable Grazing On Saline Land In Western Australia - Multidisciplinary Research Linking Producers And Scientists, Hayley C. Norman, D. G. Masters, M. G. Wilmot, A. J. Rintoul, R. Silberstein, E. Lefroy, T. York
Sustainable Grazing On Saline Land In Western Australia - Multidisciplinary Research Linking Producers And Scientists, Hayley C. Norman, D. G. Masters, M. G. Wilmot, A. J. Rintoul, R. Silberstein, E. Lefroy, T. York
IGC Proceedings (1977-2023)
Dryland salinity is one of the most critical environmental issues challenging Western Australian farmers. Currently 10% of the cropping zone (1.8 million ha) is salt-affected and this is predicted to increase dramatically in the next 50 years (NLWRA, 2001). Animals grazing saline pasture systems represent the most likely large-scale opportunity for economic return from saline land in the short to medium term. To date, few farmers have invested in large-scale revegetation of saline land as the economic return from grazing has not been perceived to cover costs. Furthermore other benefits of saltland pasture systems, such as biodiversity, water use and …
Factors Influencing The Adoption Of Fodder Production Techniques By Milk Producers In Dhankuta District, Eastern Nepal, C. P. Ferris, R. Nelson
Factors Influencing The Adoption Of Fodder Production Techniques By Milk Producers In Dhankuta District, Eastern Nepal, C. P. Ferris, R. Nelson
IGC Proceedings (1977-2023)
Many districts are food-deficient in Nepal. Increased milk consumption could improve human health and nutrition, while milk sales can provide families with a valuable source of income. However, milk production in Nepal is low, mainly because of the poor nutritional status of livestock, which can be attributed in part to a fodder deficit. However there is potential to increase fodder production, and some innovative fodder production techniques have been tried and proven locally. These include planting of fodder trees, fodder grasses and fodder crops. As the level of adoption of these techniques is variable, a survey was undertaken to quantify …
New Zealand Pastoral Systems: A Current Perspective, F. R. Duder, R. B. Green, W. D. Catto, D. R. Woodfield, B. R. Guy
New Zealand Pastoral Systems: A Current Perspective, F. R. Duder, R. B. Green, W. D. Catto, D. R. Woodfield, B. R. Guy
IGC Proceedings (1977-2023)
New Zealand's diverse grassland resource of 13.5 M ha of permanent pasture, tussock or alpine grasslands underpin an intensive pastoral industry worth NZ$13 billion in 2004. The pastoral industry involves 37,000 farmers and a service industry of about 215,000 persons. It produces 27 M prime export lambs and 180,000 t of predominantly crossbred wool from 40 M ewes; 13 B litres of milk from 5.2 M dairy cattle; 800,000 t of beef from 4.7 M beef cattle and 33,000 t of venison from 2 M deer. Pastures and forage crops, mostly non- irrigated, are grazed 'in situ' by animals through …
Forages For Horses Programmes, G. W. Wilson, R. L. Hendershot, J. Hoorman
Forages For Horses Programmes, G. W. Wilson, R. L. Hendershot, J. Hoorman
IGC Proceedings (1977-2023)
A survey by the American Horse Council in 1996 showed there were 6.9 million horses in the USA with 1.9 million horse owners and 7.1 million people involved in allied industries. The value of the USA horse industry to the gross national product is $25.3 billion. Nationally, 2.2 % of households own a horse but 4.9 % of households want to own a horse. Ohio's horse industry has 192,000 horses (7th nationally) and generates $776 million per year. Most of the 48,500 homes with horses in Ohio have 2-5 horses with 1-2 ha of land. Many exercise lots and high-use …
Forages For Horses, J. C. Fisher, D. H. Samples, R. A. Sherman
Forages For Horses, J. C. Fisher, D. H. Samples, R. A. Sherman
IGC Proceedings (1977-2023)
According to the 1997 Census of Agriculture, Ohio had 11,668 horse farms. An OSU survey estimated nearly 250,000 horses in Ohio. The large number of horses in the state has prompted many questions from producers to Extension personnel on the topic of improving forage resources. While many horse producers are proficient at equine management, they have not had formal training in forage production and management. Often, traditional agronomic programs don't target this audience. Many horse producers do not have the land mass, and/or experience to utilise large mechanical equipment for renovation and management
Priority Tree Fodder Species In The Maasai Silvopastoral System Of Kajiado District, Kenya, Evelyne Kiptot
Priority Tree Fodder Species In The Maasai Silvopastoral System Of Kajiado District, Kenya, Evelyne Kiptot
IGC Proceedings (1977-2023)
In an effort to improve pastoral land management systems, donor agencies have spent millions of dollars over the last two decades on research and development programmes. However, most of these programmes have been unsuccessful. The reasons for the failure are increasingly clear. Current thinking argues that more attention needs to be given to local knowledge systems and rural people's participation in development planning and implementation. The involvement of local communities in the research process is critical and has been shown by Ego (2001) to lead to the design of appropriate interventions. The main objective of this study was to elicit …
On-Farm Participatory Research Is An Essential Step Towards Achieving Successful Adoption Of Innovation: ‘Lifetime Wool’ A Case Study, Chris Oldham, P. Barber, M. Curnow, S. Giles, D. Gordon, A. Thompson
On-Farm Participatory Research Is An Essential Step Towards Achieving Successful Adoption Of Innovation: ‘Lifetime Wool’ A Case Study, Chris Oldham, P. Barber, M. Curnow, S. Giles, D. Gordon, A. Thompson
IGC Proceedings (1977-2023)
'Lifetime Wool' project (LTW) is a national project that is developing new nutritional guidelines for the management of ewe flocks across Australia funded by farmers through Australian Wool Innovation (AWI EC298; 2001-2008). A large replicated plot-scale experiment was used to define the dose-response of current production (wool and reproduction from the ewe) and future production (survival, growth and wool from progeny over their lifetime) to a range of levels of ewe nutrition (Thompson & Oldham, 2004). However, farmers and research workers have long realised that the difference between the results obtained on experimental plots and those obtained by farmers is …
Management Of Gastro-Intestinal Parasite Pressure, Under Grazing In Organic Farms: Development Of A Decision Support System Through The Mobilisation Of A Participative Research Process, D. Jamar, Virginie Decruyenaere, Y. Seutin, D. Stilmant, L. Perriaux, P. Stassart
Management Of Gastro-Intestinal Parasite Pressure, Under Grazing In Organic Farms: Development Of A Decision Support System Through The Mobilisation Of A Participative Research Process, D. Jamar, Virginie Decruyenaere, Y. Seutin, D. Stilmant, L. Perriaux, P. Stassart
IGC Proceedings (1977-2023)
Under grazing, gastro-intestinal parasite management remains a major problem in ruminant production systems, more especially in systems respecting organic farming rules following their obligations (1) to perform grazing as soon as pedo-climatic conditions are adapted and (2) to use anti-parasitic products only in a curative way. Surprisingly, this problem has not been highlighted by the different stakeholders in the food chain from cattle meat production to consumption. This could arise from the lack of a clear and pertinent norm or infestation threshold that would allow differentiation between preventive and curative treatments. Such a norm would indicate to the breeder whether …
Farmer-Directed On-Farm Experimentation Examining The Impact Of Companion Planting Barley And Oats On Timothy-Lucerne Forage Establishment In Central Newfoundland, D. Spaner, A. G. Todd
Farmer-Directed On-Farm Experimentation Examining The Impact Of Companion Planting Barley And Oats On Timothy-Lucerne Forage Establishment In Central Newfoundland, D. Spaner, A. G. Todd
IGC Proceedings (1977-2023)
Growing barley or oats in the year of forage establishment is a common agronomic practice in marginal growing regions, but is often not recommended to growers in Newfoundland. Spaner & Todd (2003) reported that barley seeded at rates of 100-150 kg seed/ha and undersown with a timothy-clover mixture (harvested at mid-milk) resulted in the planting year in greater forage yield of poorer quality than pure-stand timothy-clover. A barley seeding rate of 100 kg seed/ha did not impede forage production in the subsequent year.
Diagnosing Nitrogen, Phosphorous And Potassium Status Of Natural Grassland In The Presence Of Legumes, C. Jouany, P. Cruz, J. P. Theau, M. Duru
Diagnosing Nitrogen, Phosphorous And Potassium Status Of Natural Grassland In The Presence Of Legumes, C. Jouany, P. Cruz, J. P. Theau, M. Duru
IGC Proceedings (1977-2023)
In most temperate areas, sustainable management of grassland ecosystems has to deal with evaluation and management of N, P and K resources. For this purpose, appropriate diagnostic systems are needed in order to manage fertilisation accordingly. The nutrient index method based on nutrient concentrations in plant tissues relative to the degree of growth has been developed; it relies on critical curves which serve for diagnostic: for N, the critical curve gives the optimum N concentration for different levels of biomass accumulation in swards, for P and K optimum concentrations are a linear function of sward N concentration (Duru & Thélier-Huché, …
Variation Of Ldmc And Sla Relationship Between Growth Forms In Natural Grasslands, J. Viégas, P. Cruz, J. P. Theau, C. Jouany, P. Ansquer, R. Al Haj Khaled, O. Therond, M. Duru
Variation Of Ldmc And Sla Relationship Between Growth Forms In Natural Grasslands, J. Viégas, P. Cruz, J. P. Theau, C. Jouany, P. Ansquer, R. Al Haj Khaled, O. Therond, M. Duru
IGC Proceedings (1977-2023)
In agro-ecological studies, there is a growing interest in measuring both leaf dry matter content (LDMC) and specific leaf area (SLA). This interest lies on the fact that leaf traits are linked to gradients of environmental factors and ecosystem functions. Working with three contrasting wild species, Garnier et al. (2001) proposed a model linking these two traits. The model shows a relatively simple non linear and negative correlation between LDMC and SLA. Nevertheless, none of the species used to build the model were grasses (GRA) or forb rosettes (ROS = i.e. dicotyledonous with large entire leaves and absence of …
Leaf Dry Matter Content Of Native Grassland Species Under Contrasting N And P Supply, P. Cruz, C. Jouany, Jérome M. Enjalbert, Michael Duru
Leaf Dry Matter Content Of Native Grassland Species Under Contrasting N And P Supply, P. Cruz, C. Jouany, Jérome M. Enjalbert, Michael Duru
IGC Proceedings (1977-2023)
The management of native grasslands - herbaceous vegetation with a broad diversity of flora and a large range of uses - must meet the requirements of environmental conservation and improvement of the quality of agricultural production. For this purpose we need tools for diagnosing the state of the vegetation in order to design, evaluate, and apply management practices to attain these objectives. These tools must be simple and quick to use and should not require botanical skills. Leaf dry matter content (LDMC) has been proposed as a good indicator of both fertility gradients and species preference for habitats (Cruz et …
Potentialities Of Near Infrared Spectroscopy To Assess Nitrogen, Phosphorus And Potassium Nutrient Status Of Grasslands In The Reunion Island, Philippe Lecomte, Vincent Blanfort, Michael Duru, P. Thomas, P. Grimaud
Potentialities Of Near Infrared Spectroscopy To Assess Nitrogen, Phosphorus And Potassium Nutrient Status Of Grasslands In The Reunion Island, Philippe Lecomte, Vincent Blanfort, Michael Duru, P. Thomas, P. Grimaud
IGC Proceedings (1977-2023)
Controlled mineral fertilisation practices are an important component for sustainable management of grasslands. The assessment of available nutrients for plants and the general recommendations on the level of phosphorus and potassium to apply to grasslands are classically based on classical soil analysis and average regional levels. For nitrogen, mid or long term recommendations cannot easily be derived solely from soil composition, because it may be rapidly leached from the soil. Recent approaches tended to show that herbage plant N (Lemaire & Gastal, 1997), P, K (Duru & Huché, 1997) mineral analyses associated with actual biomass measurement could be useful for …